Electronics and Communication Engineering - Digital Electronics - Discussion

38. 

How many different BCD number can be stored in a register containing 12 switches using an 8, 4, 2, 1 code?

[A]. 99
[B]. 100
[C]. 999
[D]. 1000

Answer: Option D

Explanation:

No answer description available for this question.

Sharjeel said: (May 12, 2017)  
Can anyone elaborate the answer? please.

Harini said: (Oct 11, 2017)  
1 Switch is equivalent to 1 bit Cz Switch store either on or off value like a bit can be 0 or 1.

So total 12 bits are there(cz there 12 switches)

Make 3 group of 12 bit . Means each group contain 4 bit.

(_ _ _ _) (_ _ _ _) (_ _ _ _)

G1. G2. G3

Here in any group max 10 numbers can be stored Cz BCD numbers we have to store.

So 10*10*10 different BCD numbers can be stored in this 12 Switches. So Ans is option D) 10^3.

O Ravinder said: (Aug 27, 2019)  
Excellent explanation, Thank you @Harini.

Sinu said: (Oct 4, 2020)  
Good and useful explanation. Thank you @Harini.

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